GHM GREISINGER GMUD MP Series Technical document

T45.0.0X.6C-09
GHM GROUP - Greisinger
GHM Messtechnik GmbH | Hans-Sachs-Str. 26 | 93128 Regenstauf | GERMANY
Tel.: [phone] | [email protected] | www.greisinger.de
Mounting and operating manual
Pressure Transducer
As of Version 2.2
GMUD MP

Read carefully before first operation!
WEEE-Reg.-Nr. DE 93889386

Consider safety instructions!

Keep for future reference!

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1GENERAL NOTE......................................................................................................................................................3
2SAFETY......................................................................................................................................................................3
2.1 INTENDED USE.......................................................................................................................................................3
2.2 QUALIFIED STAFF ..................................................................................................................................................3
2.3 SAFETY SIGNS AND SYMBOLS................................................................................................................................3
2.4 SUITABILITY ..........................................................................................................................................................3
2.5 REASONABLY FORESEEABLE MISUSE ....................................................................................................................3
2.6 SAFETY INSTRUCTIONS..........................................................................................................................................4
2.6.1 During configuration .....................................................................................................................................4
2.6.2 During normal operation...............................................................................................................................4
3PRODUCT DESCRIPTION......................................................................................................................................5
3.1 SCOPE OF SUPPLY ..................................................................................................................................................5
3.2 OPERATING AND MAINTENANCE ...........................................................................................................................5
3.3 TYPE PLATE ...........................................................................................................................................................5
3.4 AVAILABLE OPTIONS.............................................................................................................................................5
3.5 GENERAL INSTALLATION INSTRUCTIONS ..............................................................................................................6
3.5.1 Wall mounting................................................................................................................................................6
3.5.2 Connector mounting.......................................................................................................................................6
3.5.3 Pressure connection.......................................................................................................................................6
3.5.4 Commissioning...............................................................................................................................................7
3.5.5 Decommissioning...........................................................................................................................................7
3.5.6 Ready for operation .......................................................................................................................................7
3.6 CONNECTION .........................................................................................................................................................8
3.7 DISPLAY ................................................................................................................................................................9
3.8 KEYPAD.................................................................................................................................................................9
4CONFIGURATION.................................................................................................................................................10
4.1 PASSWORD LOCK.................................................................................................................................................10
4.2 OUTPUT CONFIGURATION....................................................................................................................................10
4.3 CORRECTION .......................................................................................................................................................11
4.4 SEA LEVEL CORRECTION (ONLY FOR ABSOLUTE DEVICES) .................................................................................11
4.5 TRANSISTOR OUTPUT (ONLY AVAILABLE WITH OPTION –OUT) .........................................................................11
4.6 FILTER SETTINGS .................................................................................................................................................12
4.7 LOCK SETTINGS ...................................................................................................................................................12
5DETAILS FOR PRESSURE MEASUREMENT ..................................................................................................12
5.1 ABSOLUTE PRESSURE ..........................................................................................................................................12
5.2 DIFFERENTIAL PRESSURE ....................................................................................................................................12
5.3 RELATIVE PRESSURE ...........................................................................................................................................12
6ERROR AND SYSTEM MESSAGES....................................................................................................................13
7INSPECTION OF ACCURACY / ADJUSTMENT SERVICE ...........................................................................13
8RESHIPMENT AND DISPOSAL...........................................................................................................................13
9SPECIFICATION ....................................................................................................................................................14
10 SENSOR ACCURACIES.....................................................................................................................................15
10.1 ACCURACIES WITH STANDARD MEASURING RANGES......................................................................................15
10.1.1 GMUD-MP special model for low pressure (differential pressure) ............................................................15
10.1.2 GMUD-MP standard (differential pressure)...............................................................................................15
10.1.3 GMUD-MP standard (absolute pressure) ...................................................................................................15
10.1.4 GMUD-MP special model for barometric pressure ....................................................................................15
10.2 ACCURACIES WITH SPECIFIC MEASURING RANGES..........................................................................................15

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1 General note
Any task should exclusively be performed by subject-specific qualified personnel.
The skilled personnel should carefully read and understand the manual before using the device.
Keep this document in reach for reference in case of any doubt.
The liability and warranty of the manufacturer for damages and consequential damages expires with
unintended use, failure to observe these operating instructions, non-observance of safety instructions,
insufficiently skilled qualified personnel or unauthorized modifications to the device.
2 Safety
2.1 Intended use
The transducers of the GMUD MP series are exclusively suitable for:
Transducing of (depending on device type) differential, relative or absolute pressure (within the pressure
range specified on the identification plate meeting all specifications in 9 Specification on page 14 and 10
Sensor accuracies on page 15) into an electrical signal (adjustable, 4..20 mA or 0..10 V). Any other use is
not intended!
2.2 Qualified staff
For operating, running, maintaining and commissioning the device, the staff needs to have an adequate level
of knowledge of both, the measuring and the meaning of measured values. This manual can be a valuable
contribution. All instructions have to be well-understood and complied with. To be sure that there is no risk
arising due to misinterpretation of measured values, the operator must have further knowledge in case of
doubt - the user is liable for any harm/damage resulting from misinterpretation due to insufficient knowledge.
The manufacturer will assume no liability or warranty in case of usage for other purpose than the intended
one, ignoring this manual, operating by unqualified staff as well as unauthorized modifications to the device.
2.3 Safety signs and symbols
Warning notices are marked in this manual as shown below:
Caution! This symbol warns of imminent danger, death, serious injuries and significant
damage to property at non-observance.
Attention! This symbol warns of possible dangers or dangerous situations which can
provoke damage to the device or environment at non-observance.
Note! This symbol point out processes which can indirectly influence operation or provoke
unforeseen reactions at non-observance.
2.4 Suitability
The operator is responsible for verifying that the product is suitable for the desired
application. In case of doubt please contact our sales and marketing department.
The GHM-Messtechnik GmbH is not liable for incorrect choice, mounting, configuration or
connection and any result obtained from this!
2.5 Reasonably foreseeable misuse
This device must not be used at potentially explosive areas!
The transducer must not be used at a patient for diagnosis or any other medical
purpose!
The differential pressure transducers must not be used as safety pressure monitor
for fireplace, exhaust- or ventilating systems!
Do not use this product as safety or emergency stop device or in any other
application where failure of the product could result in personal injury or material
damage.
Any failure to comply with these instructions could result in death, serious injury and
material damage.

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2.6 Safety instructions
This device has been designed and tested in accordance with the safety regulations for electronic devices.
However, its trouble-free operation and reliability cannot be guaranteed unless the standard safety measures
and special safety advises given in this manual will be adhered to when using the device.
2.6.1 During configuration
When transporting the device from a colder to a warmer ambience condensation may
cause a malfunction. In that case, before operating, it is needed to wait until the device
temperature has aligned to the ambience.
The conceptual design, particularly when connecting with other devices has to be done
thoroughly.
Internal connections of other devices (e.g. from ground with protective earth)
may lead to prohibited voltage levels that could disturb the function, damage or even
destruct the device or any connected equipment.
Never run the device with a damaged or faulty power supply.
Risk of death by electrocution!
2.6.2 During normal operation
Whenever there may be a risk whatsoever involved in running it, the device has to be
switched off immediately and to be marked accordingly to avoid re-starting. Operator safety
may be a risk if:
- there is visible damage to the device
- the device is not working as specified
- the device has been stored under unsuitable conditions for a longer time
In case of doubt, please return device to manufacturer for repair or maintenance (with
costs).
After exceeding the specification an inspection or repair at charge at the manufacturer’s site
is necessary. Tubes, connectors or the sensor element inside the device could be damaged
due high pressure or temperature. These damages can (even at a later time) lead to
functional disorder.

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3 Product description
3.1 Scope of supply
GMUD MP with one elbow-type plug (2 with option /OUT)
Mounting and operating manual GMUD MP
Unit labels (depending on type)
3.2 Operating and maintenance
Treat device and sensor carefully. Use only in accordance with above specification. (Do
not throw, hit against etc.). Protect plug and socket from soiling.
Supply connection / mains operation:
When connecting a mains cable, please take care to connect only allowed components.
Carefully check the polarity and the correct connection.
Don’t apply overvoltage!
The device contains no serviceable parts inside. In case of errors or malfunction please
return device to manufacturer for repair or maintenance (with costs).
3.3 Type plate
Production date
code
Serial number
Article number
CE-Conformity
(see page 14)
Disposal references
(see page 13)
Carefully read the
manual
Manufacturer address
3.4 Available options
Option
Description
LACK
Printed circuit board coated on both sides (e.g. for outdoor use)
OUT
Additional transistor output
WE: …
Factory pre-configurated (e.g. output configuration)
MBF, MBS
Custom pressure range (see page 15)
OD
Closed housing, display and keypad under top cover
Option WE: …
The factory pre-configuration can be changed manually.
Carefully check configuration before every commissioning.
Hint for option -OD:
Open cover for having access to display and buttons

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3.5 General installation instructions
All screws and fittings have to be tightened finger tight.
Any cable used must fulfill the correct function of the strain relief.
It’s only permitted to use cables with sufficient cable cross-section.
Cables with visible optical or mechanical damages have to be replaced immediately by
faultless ones.
The device operation is only permitted with closed housing, signal- and supply lines being
correctly wired, screwed connector sockets with correctly attached connector seal and with
pressure lines being correctly connected and secured to prevent accidental releasing.
3.5.1 Wall mounting
For wall mounting loosen screws (A). Remove
cover (B) from base (D).
Wall mounting screws (C) are not included.
The mounting-hole-diameter is 4.2 mm.
See pattern drilling above (50 x 70 mm)
3.5.2 Connector mounting
Release the screw (1).
Unplug the connector.
Release the connection sealing, cable fitting (2), shim (3) and sealing-ring (4).
Pull out the connection socket (6).
Thread cable through parts (2), (3), (4) and into connector-housing (5). Connect wires according to wiring
diagram on page 8.
Reattach part (6) in (5). According to mounting situation select best of the 4 possible positions.
Reattach parts (4) and (3) and tighten (2). Plug in the connector with connection sealing and tighten (1).
3.5.3 Pressure connection
Left pressure port: Higher pressure (+)
Right pressure port (if available): Lower pressure (-)
Depending on pressure and pressure-tube a securing for accidental removing is needed (recommendation:
GDZ-18 or GDZ-19)
Pattern drilling
for wall mounting
50 x 70 mm

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3.5.4 Commissioning
Unpack the device, accessories and check scope of supply (maybe the packing still contains some parts).
Mount the device according to general mounting instructions permanent and safe.
Attach non-active power supply.
Carefully check connection (supply and signal)
Connect transistor output with circuitry or detector (only with option /OUT).
Now activate the power supply.
Configure the device (Settings, output …).
Check transistor output.
Carefully check normal operation mode of the output (“output in case of an error”):
When exceeding the range, according to configuration the output can change from 20 mA to < 3.6 mA! On a
control chain a vent control would keep the vent open! In that case the normal operation mode of the output
must be set to > 20 mA to close the vent.
Check correct function of the notification chain (only with option /OUT).
Mount the pressure tubes and secure the tube from accidental removing.
Now apply process pressure.
3.5.5 Decommissioning
Turn off process pressure and wait until the pressure has fallen to 0.
Unplug the pressure tubes after that unplug the supply and all circuitry.
Demount device.
3.5.6 Ready for operation
Right after turning on the device will perform a self-diagnostic check (about 5 sec.)
During this time, all display segments are active and the output is in error-state.
After the check the device will change in measuring mode and is ready for use.

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3.6 Connection
Connection for the elbow-type plug (according to device configuration)
Only with option /OUT
Connector left side
DC-isolated switching output,
switching to GND.
Threshold settings via configuration
menu
Switching output
1 = + (UAl max 28V, IVmax 40mA)
2 = -
Connector right side Supply and
signal output Current- or voltage
signal selectable via menu
Current (4..20 mA)
1 = 4..20 mA current loop +
2 = 4..20 mA current loop -
3 = Do not connect!
Voltage (0..10 V)
1 = +UV (+18..30 VDC) / 24 V AC
2 = GND / 24 V AC
3 = 0..10 V output
The cable length on the transistor output must not exceed 3 m and must not leave parts of
the building!
An appropriate external surge protection (e.g. in case of direct / indirect lightning stroke)
must be installed when using cable length > 30 m, when the cabling is leaving parts of the
building or when using on a central direct current feed-in.
Otherwise the following applies:
The cables for 0..10 V and 4..20 mA must not leave parts of the building!
The cables for 0..10 V and 4..20 mA must not exceed a length of 30 m!

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3.7 Display
Labels can be replaced in the transparent unit-window. To replace a label, unscrew the cover and shove it
in.
The displayed unit is according to the configuration set in
Display
Information
Correction active
Offset-, scale- or sea-level-correction
Switching output active
Upper or lower threshold value
Value with decimal point according to selected unit.
Display self test (at device startup)
Clear (Resets min and max value memory)
Lo (Displays min value from memory)
Hi (Displays max value from memory)
3.8 Keypad
Task
Keypad
Display
Description
View min value
Press button ▼
shortly once
For 15 seconds the display will alter between min
value and ‘Lo’.
View max value
Press button ▲
shortly once
For 15 seconds the display will alter between max
value and ‘hi’.
View current
value
Press button SET
shortly once
Current value is displayed
Reset min and
max value
memory
Press and hold
button ▼and ▲
Resets min and max value memory, display shows
‘CLr’ (clear) and alters to normal display mode.
Configuration
menu
Press and hold
button SET
Opens the configuration menu

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4 Configuration
Follow these instructions to configure the functions of the device:
Press button SET until the first parameter becomes visible in the.
Switch to the desired parameter by pressing the button SET.
Use the button ▲or ▼to change a value and use button SET to validate the value.
If there is no key pressed within the menu mode within 2 minutes, the configuration will be
cancelled.
All changed settings will be lost!
Changing the device parameters is password protected by factory default. The password
must be set correctly to 185 for entering the menu. The last menu point gives the option to
disable the password protection.
4.1 Password lock
Display
Values
Information
SET
Button ▼ and ▲
Password
For entering the configuration menu the password has to be set to 185.
4.2 Output configuration
To achieve best accuracy the output signal should be at least 50 % of the used
sensor’s measuring range.
Refer to 10 Sensor accuracies on page 15.
Setting the output to 0..1 mbar when using a sensor range of -10..10 will extremely
decrease the accuracy.
Display
Values
Information
SET
Button ▼ and ▲
Unit and range of the pressure display
The unit defines the decimal point position as well as the display range.
Depending on the sensor range some units may not be visible.
bar
mbar
Pascal
hecto Pascal
PSI
Torr (= mmHg)
Output type
Voltage output (0 … 10 V)
Current output (4 … 20 mA, factory default)
Output zero point (low value)
…
Display value for an output value of 4 mA (or 0V)
(Factory default: Lower measuring range)
Output scale (high value)
…
Display value for an output value of 20 mA (or 10V)
(Factory default: Upper measuring range)
Output in case of an error
Output is <= 3,6 mA / 0V (factory default)
Output is >= 21 mA / 10,5 V